Graft Delivery Device with Dosage Window and Pressure Relief
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Solution Overview
Problem
Current bone graft delivery systems face challenges in accurately dispensing graft material, often leading to inefficiencies and sub-optimal patient outcomes due to crude loading methods and inaccurate volume delivery.
Innovation Solution
A graft delivery device with an actuation mechanism and a tube featuring a dosage window and pressure relief opening, allowing for precise control and accurate dispensing of graft material through a plunger mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If crude packing methods are used to load bone material into the dispensing device, then loading is easier and faster, but accuracy and precision of volume delivery deteriorates
Solution Approach 1:
A transfer device acts as an intermediary between the bone material source and the dispensing device. The transfer device includes a transfer chamber that receives bone material and a transfer plunger that precisely dispenses controlled amounts to the dispensing device, ensuring accurate volume transfer while maintaining ease of operation
Solution Approach 2:
The system performs preliminary actions by pre-loading the transfer device with bone material before the actual dispensing procedure. The transfer chamber is filled with bone material in advance, and the transfer plunger is positioned to deliver precise volumes, eliminating the need for crude packing during the surgical procedure
2Device complexity
If manual packing of bone material is used, then device complexity is reduced, but manufacturing precision of volume delivery deteriorates
Solution Approach 1:
The transfer device is designed to be self-servicing through a self-contained transfer chamber and plunger mechanism. The device automatically controls the transfer of bone material from the loading source to the dispensing site without requiring complex external packing equipment, maintaining simplicity while achieving precise volume delivery through the self-regulating plunger mechanism
3Productivity
If uncontrolled dispensing is used, then operation speed is increased, but loss of substance due to waste and spillage increases
Solution Approach 1:
The system incorporates feedback mechanisms through a dosing window that allows real-time visual monitoring of the dispensing process. The plunger position and bone material volume are visible through the window, enabling the operator to control the dispensing rate and stop precisely when the required amount is delivered, preventing waste while maintaining efficient operation speed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables accurate and controlled dispensing of graft material, improving procedural efficiency and enhancing patient outcomes by ensuring the right amount of graft is delivered to the target site.
Implementation Method 1
The pressure relief opening is configured to allow fluid to escape the lumen as graft material is received through the open end into the pressure chamber
Data Source
AI summary
Disclosed herein are systems and methods for graft delivery with accurate dispensing. For example, a device for delivering graft material to a target site includes an actuation mechanism and a tube. The tube defines a lumen and an open end and is configured to receive graft material through the open end. The tube includes a pressure relief opening and a dosage window. The pressure relief opening is disposed in a wall of the tube, defining a pressure chamber between the open end and the pressure relief opening. The device further includes a plunger positioned within the lumen of the tube and coupled to the actuation mechanism such that at least a portion of the plunger (or the actuation mechanism) is visible through the dosage window. The actuation mechanism is configured to advance the plunger toward the open end to deliver graft material through the open end.